Corrected entry: When Connor, Murphy, and Romeo have the shootout with the Mobsters at the bar, you'll notice that only a few of the Mobsters were actually shot. Some of the others just dropped to the floor without injury.

Corrected entry: In the scene when Connor and Murphy are swinging down the Prudential building to get at Yakavetta, in one shot before they hit the window, both brothers are shooting at the glass to weaken it, but in the next shot, it looks as though the brother on the right side of the screen does not even have his gun drawn at all, but is instead trying to cut his rope.

Correction:Both brothers have their guns out. The brother on the right has his gun pointed towards the brother on the left. Since there isn't any reflection on it and they're wearing black it is much harder to see. When you view it in slow motion you can see the knife in his right hand and another object in his left. The other object being the gun.